| cork | oak |
| CAS: 977038-68-8 Use(s): natural substances and extractives | |
| steel cut | oat |
| CAS: 84012-26-0 EC: 281-672-4 Use(s): food additive | |
| oat bran | |
| CAS: 84012-26-0 EC: 281-672-4 Use(s): food additive and cosmetic agents | |
| oat flake | |
| CAS: 84012-26-0 EC: 281-672-4 Use(s): food additive | |
| oat gum | |
| CAS: 73020-09-4 Use(s): thickeners, gelling agents, stabilizers | |
| oat hull fiber | |
| Use(s): dietary supplements | |
| oat kernel protein | |
| CAS: 134134-87-5 Use(s): food additive and cosmetic agents | |
| oatmeal | |
| CAS: 84012-26-0 EC: 281-672-4 Use(s): food additive and cosmetic agents | |
| ocimum basilicum | |
| CAS: 84775-71-3 EC: 283-900-8 FEMA: 2118 Use(s): food additive | |
| ocimum basilicum leaf powder | |
| CAS: 84775-71-3 EC: 283-900-8 FEMA: 2118 Use(s): spices, other natural seasonings and flavorings | |
| ocimum gratissimum | |
| Use(s): spices, other natural seasonings and flavorings | |
| ocimum minumum | |
| CAS: 977051-55-0 Use(s): spices, other natural seasonings and flavorings | |
| ocimum sanctum leaf | |
| CAS: 91845-35-1 EC: 295-208-3 Use(s): spices, other natural seasonings and flavorings | |
| octacosanol | |
| CAS: 557-61-9 EC: 209-181-2 Use(s): special dietary and nutritional additives | |
| octadecyl amine | |
| CAS: 124-30-1 EC: 204-695-3 Use(s): boiler water additives, emulsifiers, stabalizers, thickeners | |
| octafluorocyclobutane | |
| CAS: 115-25-3 EC: 204-075-2 Use(s): propellants, aerating agents, and gas | |
| octanoic acid | |
| CAS: 124-07-2 EC: 204-677-5 FEMA: 2799 JECFA: 99 FLAVIS: 08.010 Use(s): flavor and fragrance agents | |
| 3-oxo | octanoic acid glyceride |
| CAS: 91052-68-5 EC: 293-230-8 FEMA: 3771 JECFA: 911 FLAVIS: 09.556 Use(s): emulsifiers, flavoring agents | |
| octanol | |
| CAS: 111-87-5 EC: 203-917-6 FEMA: 2800 JECFA: 97 FLAVIS: 02.006 Use(s): flavor and fragrance agents | |
| 1- | octenyl succinic anhydride |
| CAS: 7757-96-2 EC: 231-828-2 Use(s): food starch-modified | |
| octoxynol-1 | |
| CAS: 2315-67-5 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-3 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-5 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-6 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-7 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-8 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-9 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-10 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-11 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-12 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-13 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-16 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-20 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-25 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-30 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-33 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-40 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octoxynol-70 | |
| CAS: 9002-93-1 Use(s): adjuvants for pesticide use dilutions | |
| octyl alcohol synthetic | |
| CAS: 977152-92-3 Use(s): multipurpose additives | |
| octyl gallate | |
| CAS: 1034-01-1 EC: 213-853-0 Use(s): antioxidants | |
| 4-(tert- | octyl) phenol |
| CAS: 140-66-9 EC: 205-426-2 Use(s): adjuvants for pesticide use dilutions | |
| olea europaea fruit extract | |
| CAS: 8001-25-0 EC: 232-277-0 FEMA: 4801 Use(s): cosmetic agents, dietary supplements | |
| olea europaea pulp extract | |
| CAS: 8001-25-0 EC: 232-277-0 Use(s): antioxidants | |
| (Z)- | oleic acid |
| CAS: 112-80-1 EC: 204-007-1 FEMA: 2815 JECFA: 333 FLAVIS: 08.013 Use(s): thickeners, gelling agents, stabalizers and emulsifiers | |
| oleic acid from tall oil fatty acids | |
| CAS: 977047-39-4 Use(s): coatings, films and related substances | |
| olestra | |
| CAS: 121854-29-3 Use(s): used in place of fats and oils | |
| oleyl acetate | |
| CAS: 693-80-1 EC: 211-759-4 FEMA: 4359 JECFA: 1638 Use(s): cosmetic agents | |
| (Z)- | oleyl alcohol |
| CAS: 143-28-2 EC: 205-597-3 FEMA: 4363 JECFA: 1637 Use(s): cosmetic agents and indirect food additives: paper and paperboard components | |
| oligosaccharides | |
| CAS: 66455-21-8 Use(s): food additive | |
| olive oil | |
| CAS: 8001-25-0 EC: 232-277-0 Use(s): solvents/deluents for flavor and/or fragrance agents | |
| onion | |
| Use(s): spices, other natural seasonings and flavorings | |
| green | onion |
| Use(s): food additive | |
| onion juice concentrate | |
| Use(s): flavoring agents, food additives | |
| onion oleoresin | |
| CAS: 130007-42-0 Use(s): flavoring agents and adjuvants | |
| onion salt | |
| Use(s): spices, other natural seasonings and flavorings | |
| opoponax | |
| CAS: 977136-06-3 Use(s): spices, other natural seasonings and flavorings | |
| opoponax gum | |
| CAS: 9000-78-6 EC: 232-558-8 Use(s): flavor and fragrance agents | |
| orange B | |
| CAS: 15139-76-1 Use(s): coloring agents | |
| orange essence | |
| CAS: 977091-85-2 Use(s): flavoring agents | |
| orange essence oil | |
| CAS: 68514-75-0 FEMA: 4866 Use(s): flavor and fragrance agents | |
| orange essence oil folded | |
| CAS: 68514-75-0 Use(s): flavor and fragrance agents | |
| orange essence oil terpeneless | |
| CAS: 68514-75-0 Use(s): flavor and fragrance agents | |
| bitter | orange flower |
| CAS: 977051-52-7 Use(s): food additive | |
| orange juice | |
| CAS: 977059-38-3 Use(s): flavoring agents and adjuvants | |
| orange juice oil | |
| CAS: 132538-94-4 Use(s): flavoring agents | |
| orange peel | |
| CAS: 977070-86-2 Use(s): spices, other natural seasonings and flavorings | |
| orangeflowers | |
| CAS: 8030-28-2 FEMA: 2819 Use(s): spices, other natural seasonings and flavorings | |
| oregano leaf | |
| CAS: 977138-70-7 FEMA: 2827 Use(s): spices, other natural seasonings and flavorings | |
| oregano oleoresin | |
| Use(s): flavoring agents and adjuvants | |
| origanum laevigatum | |
| Use(s): spices, other natural seasonings and flavorings | |
| origanum majorana | |
| CAS: 977051-23-2 FEMA: 2662 Use(s): spices, other natural seasonings and flavorings | |
| origanum majorana leaf | |
| FEMA: 2662 Use(s): spices, other natural seasonings and flavorings | |
| origanum majorana oleoresin | |
| CAS: 977038-85-9 FEMA: 2659 Use(s): flavoring agents and adjuvants | |
| origanum majorana seed | |
| CAS: 977038-86-0 FEMA: 2661 Use(s): spices, other natural seasonings and flavorings | |
| origanum maru | |
| Use(s): spices, other natural seasonings and flavorings | |
| origanum onites | |
| Use(s): spices, other natural seasonings and flavorings | |
| origanum rotundifolium | |
| Use(s): spices, other natural seasonings and flavorings | |
| origanum sipyleum | |
| Use(s): spices, other natural seasonings and flavorings | |
| origanum vulgare flower | |
| CAS: 84012-24-8 EC: 281-670-3 Use(s): food additive | |
| origanum vulgare hirtum | |
| Use(s): spices, other natural seasonings and flavorings | |
| laevo- | ornithine |
| CAS: 70-26-8 EC: 200-731-7 Use(s): special dietary and nutritional additives | |
| orotic acid | |
| CAS: 65-86-1 EC: 200-619-8 Use(s): nutrient supplements, EFSA concludes: use is of safety concern. | |
| orthosilicic acid-vanillin complex | |
| Use(s): food additive, dietary supplements | |
| orthosiphon stamineus leaf extract | |
| CAS: 84012-29-3 EC: 281-674-5 Use(s): dietary supplements | |
| oryza sativa bran fiber | |
| CAS: 68553-81-1 EC: 271-397-8 Use(s): special dietary and nutritional additives | |
| oryza sativa hull powder | |
| CAS: 68553-81-1 EC: 271-397-8 Use(s): cosmetic agents, dietary supplements | |
| osteopontin | |
| CAS: 106441-73-0 Use(s): special dietary and nutritional additives | |
| oxygen | |
| CAS: 7782-44-7 EC: 231-956-9 Use(s): cosmetic agents | |
| ozone | |
| CAS: 10028-15-6 EC: 233-069-2 Use(s): antimicrobial agents |